Schmidt Rebound Hardness Dependence on the Core-Size: A Correction Model Presented and Tested on Greywacke

BRABEC, Marek and Lukáš KRMÍČEK. Schmidt Rebound Hardness Dependence on the Core-Size: A Correction Model Presented and Tested on Greywacke. Journal of Testing and Evaluation. ASTM International, 2024, vol. 52, No 4, p. 1-12. ISSN 0090-3973. Available from: https://dx.doi.org/10.1520/JTE20230628.

Basic information

• Original name: Schmidt Rebound Hardness Dependence on the Core-Size: A Correction Model Presented and Tested on Greywacke
• Authors: BRABEC, Marek and Lukáš KRMÍČEK (203 Czech Republic, belonging to the institution).
• Edition: Journal of Testing and Evaluation, ASTM International, 2024, 0090-3973.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10500 1.5. Earth and related environmental sciences
• Country of publisher: United States of America
• Confidentiality degree: is not subject to a state or trade secret
• WWW: URL
• Impact factor: Impact factor: 1.200 in 2022
• Organization unit: Faculty of Science
• Doi: http://dx.doi.org/10.1520/JTE20230628
• UT WoS: 001195848200001
• Keywords in English: Schmidt hammer; rebound hardness; core-size effect; greywacke
• Tags: rivok
• Tags: International impact, Reviewed

Abstract

We determined the effect of the core sample dimensions on the measured values of the Schmidt rebound hardness and proposed a way to correct it to obtain unaffected value. The effect was previously investigated on cubes, where a clear dependence of the rebound hardness on the cube edge was proved. For cylindrical bodies, however, the problem is more complex. In order to determine and verify our model, a set of cylindrical samples was made from greywacke. After applying the correction, an improvement in the mean rebound hardness of the whole set was achieved from 80 to 98.8 % of the unaffected mean rebound value.